Flexible seal



FIG. 1 is a front perspective view of a flexible seal showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is another front perspective view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a side elevation view thereof.

The flexible seal is shown with a symbolic break in its length. The appearance of any portion of the flexible seal between the break lines forms no part of the claimed design. 

CLAIM The ornamental design for a flexible seal, as shown and described. 